[Info-vax] Do any disks still lie about writing data to permanent storage ?

[Jan-Erik Söderholm]

Den 2021-07-06 kl. 15:04, skrev Simon Clubley:
> Talking about disks has reminded me of something else.
> 
> In the not too distant past, some disks lied about having written data
> to permanent storage instead of merely to some internal cache that
> would be lost on a power failure.
> 

They did not lie, of course. They said that the data was in the cache,
which was perfectly true.

> Do any disks still lie about having committed data to permanent storage
> or have we moved past that ?

I would expect any modern SAN system to have extensive caching
to reach good performance. Adn that the I/O finish when the data
is in the cache.

And why would the cache be lost at power failure?

I think that your way of putting your question is "questionable".